Stop mechanism.



A. P.HAWN.

STOP MECHANISM. APPLlcAUoN FILED FEB.27. 1913..

1,1 92,779. Patented July 25, 1916.

` UNITEDJ OFFICE.-

ANDREW P. HAWN, 0E LAPoETE, INDIANA, AssIGNoE, DY DIRECT AND MESNE As- SIGNMENTS, To JOHN WOLF, 0E LAroE'rE, INDIANA.

sror MECHANISM;

Specification of Letterslatent.

Patented July 25, 191e.

Original applicationled September 23, 1912, Serial N o. 721,7462 Divided'and this application led February To all whom t may concern:

Be it known that I, ANDREW P. I-IAWN,

a citizen of the United States, residing atk connection with plow lift devices although it is evident such mechanism may be used in a large number of situations where it is desirable to draw in on the cable by means of a rotating .member and to lock the cable when drawn in.

It is illustrated diagrammatically in one form in the accompanying drawing, wherein- Figure l is a detail side elevation with parts in section; Fig. 2, a front elevation' with parts broken away; Fig. 3, a detail side elevation of the latch.

Like parts are indicated by like letters throughout the several `figures.

The supporting frame A has projecting upwardly therefrom the bracket arm A1 in which is rotatably mounted the shaft A2.

driven from any suitable source of power not shown. The ratchet wheel A3 is pinned on the shaft A2 and rotates with it.y The pulley or sheave VA4 is rotatably mounted upon the shaft A2. The collar A5 is pinned to the shaft A2 adjacent the sheave A4 and holds it in position against lateral displacement. IIhe cable A6 is anchored in the sheave A4 at A7 and is adapted to pass around the sheave indicated in Fig.` 1 over the sheave A8 and lead to the object to be actuated or controlled which .I have indicated by a lever A1 ,in adjustable connection by means ,of the screw A10 and nuts A11. The sheave A4 has pivoted thereon the latch or a cam lever B perforated at B1 to surround the shaft A2 the perforation B1 being of sufficient size to permit the ylatch to oscillate without interference from the shaft. The nger B2 projects outwardly frornthe latch beyond the periphery of the sheave A".

Serial No. 750,946.

The dog B3 is pivoted on the sheave A4 and i pressed toward the ratchet A3 by the springv B6 provided at the other end with the pin B1 in engagement with the cam slot B8 in the latch B. ,The sheave A1 is provided in its periphery at a point substantially diametrically opposedto the pivotal point of the latch with the teeth or notches B9 B1o in opposition to and adapted to be engaged by a. block B11 on the lever C. The lever C isrotatably mounted on the frame A being yieldingly drawn toward thesheaveA1 by the spring C1pressing against the washer C2 adjustably mounted on the bolt-C3. This bolt is mounted in the lever. The guide bar-C4 isslidably mounted on the lever C being. guided therealong by the clips C5, is yieldingly held in the lower position by the springCG and provided with the linger C7 projectinginto the path of the linger B2. The-shaft D is -rotatably mounted in the arm A1 and carries the cam D1 rigid thereon in oppositionto the tappet D2 which is adjustably mounted in the lever C so that the rotationl of the shaft D will cause the cam D1 to pressl the lever C backward. The cable D3 lis also provided whereby the lever may bedirectly operated.

It will be evident that, while I have Shown in my `drawing an operative device, still many changes might be made in size, shape and arrangement of parts 4without-departing materially from the spirit of-my invention, and I wish therefore that my drawing be regarded as in a sense diagrammatic.

The use and operation of my invention is as follows: Assuming the device to be in the position shown with the cable wound up and the part A9 in the retracted position it becomes desirable to release the parts to permit the cable to be withdrawn ,from the sheave thus freeing the part A9. This may be done byl av timing device not shown which rotates the shaft D so that the cam thereon presses the tappet andl forces the lever away or it may be done by pulling on the cable D3 to draw the lever out. In any event the rotation of the lever about its pivotal point away from the sheave will tend to free the iblock on the lever from its engagement" with the tooth or notch B10 in the sheave when the parts are in the position shown and the sheave will then rotate making one revolution. rlhe block B11 engages the notch or tooth B9 toA hold the sheave against further rotation. Meanwhile, the finger B2 which projects from the latch B will have been brought around to a position beneath the finger C7 on the rod C4 but the dog B3 will still be held -out of engagement in the ratchet A3 owing to the relative positions of the latch and dog. Whenl the member A9 is to be retracted to lift a plow or perform any other work it is only necessary to withdraw the lever C. This will then permit the sheave A4 to rotate a little farther in response to the tension in the cable AG thus causing the finger C1 to exert a downward pressure on the finger B2 to rotate the latch in a clockwise direction with respect to the sheave A4. rlhis will bring the roller B7 into the outermost portion of the cam slot B8 and permit the dog B5 to be drawn by the spring B6 into engagement with the ratchet teeth. Since the shaft A2 is at all times rotating being driven by any suitable source of power not shown this will make a connection between the sheave and the power source. The rotation of the shaft will cause the sheave to rotate in a clockwise direction until the gear or notch B10 again comes into line with the block B11 on the lever C and the block will then be forced into the notch and hold the sheave. Meanwhile, however, at about the same time the fingery B2 will have been brought into contact with the finger C7 and will be rotated with respect to the sheave in a counter-clockwise direction thus forcing the roller B7 into the innermost end of the cam slot and drawing the dog out of connection with the ratchet, thus freeing the sheave which is now returned to the position of Fig. l. This cycle of events can be produced as often as need be. Each withdrawal of the lever will operate the device either to pay out or draw in the cable as the case may be.

I claim:

l. The combination with a shaft, and ratchet wheel rigidly mounted thereon, a disk mounted for rotation thereabout, a ratchet lever pivoted on the disk for engagement with the ratchet wheel, a cam lever pivoted on the disk and means for rocking it to operate the ratchet lever.

2. The combination with a shaft and ratchet wheel rigidly mounted thereon, a disk mounted for rotation thereabout, a ratchet lever pivoted on the disk for engagement with the ratchet wheel, a cam lever pivoted on the disk and means responsive to the rotation of the disk for rocking it to operate the ratchet lever.

3. The combination with a shaft and ratchet wheel rigidly mounted thereon, a

disk mounted for rotation thereabout, a ratchet lever pivoted on the disk for engagement with the ratchet wheel, a cam lever pivoted on the disk and means for rocking it to operate the ratchet lever, said means comprising a yielding` stop and a finger projecting from the cam lever into the path of said stop.

4. The combination with a shaft and ratchet wheel rigidly mounted thereon, a disk mounted for rotation thereabout, a ratchet lever pivoted on the disk for engagement with the ratchet wheel, a cam lever pivoted on the disk and means responsive to the rotation of the disk for rocking it to operate the ratchet lever, said means comprising a yielding stop and a finger projecting pivoted on the disk and means for rocking 2 it to operate the ratchet lever, said means comprising a yielding stop and a finger projecting from the cam lever into the path of said stop, a lever upon which said stop is mounted said disk being notched, a stop on said lever adapted to yieldingly engage the notches on the disk.

6. rll`he combination with a shaft and ratchet wheel rigidly mounted thereon, a disk mounted for rotation thereabout, a ratchet lever pivoted on the disk for engagement with the ratchet wheel, a cam lever pivoted on the disk and means responsive to the rotation of the disk for rocking it to operate the ratchet lever, said means comprising a yielding stop and a finger projecting from the cam lever into the path of lsaid stop, a lever upon which said stop is mounted said disk being notched, a stop on said lever adapted to yieldingly engage the notches on the disk.

7. In a combination a rotating shaft, a ratchet wheel rigidly mounted thereon, a disk mounted for rotation thereabout, a ratchet lever pivoted upon the disk, yielding means for drawing the ratchet engaging end of said lever toward the ratchet wheel, a cam lever mounted on the disk in engagement with one end of said ratchet lever.

8. In a combination a rotating shaft, a ratchet wheel rigidly mounted thereon, a disk mounted for rotation thereabout, a ratchet lever pivoted upon the disk, yielding means for drawing the ratchet engaging end of said lever toward the ratchet wheel, a cam lever mounted on the disk in engagement with one end of said ratchet lever, a finger projecting from said cam lever beyond the periphery of the disk and a control lever adjacent the disk.

fil

9. In a combination. a rotating shaft, a ratchet wheel rigidly mounted thereon, a notched disk mounted for rotation thereabout, a ratchet lever pivoted upon the disk, yielding means for drawing the ratchet engaging end of said lever toward the ratchet Wheel, a cam lever mounted on the disk in engagement with one end of said ratchet lever, a finger projecting from said cam lever beyond the periphery of the disk, a control lever adjacent the disk and a yielding stop on the control lever in the path of the finger.

l0. In a combination a rotating Shaft, a ratchet wheel rigidly mounted thereon, a notched disk mounted for rotation thereabout, a ratchet lever pivoted upon the disk, yielding means for drawing the ratchet engaging end of said lever toward the ratchet wheel, a cam lever mounted on the disk in engagement with one end of said ratchet lever, a finger projecting from said cam lever beyond the periphery of the disk, a control lever adjacent the disk,a yielding stop on the control lever in the path of the finger and a stop on the control lever adapted to engage the notches in the disk.

1l. In a combination a rotating shaft, a ratchet wheel rigidly mounted thereon, a notched disk mounted for rotation thereabout, a ratchetlever pivoted upon the disk, yielding means for drawing the ratchet engaging end of said lever toward the ratchet wheel, a cam lever mounted on the disk in engagement with one end of said ratchet lever, a finger projecting from said cam lever beyond the periphery of the disk, a control lever in the path of the finger, a stop on the control lever adapted to engage the notches in the disk and yielding means for drawing the control lever toward the disk into operative relation therewith.

In testimony whereof, I afIiX my signature in the presence of two witnesses this 20th day of February, 1913.

ANDREW P. HAWN.

Witnesses:

BEssIn S. RICE, DENIE A. WALTERs.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

